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Studies on nucleolus and nucleolar chromosomes in angiosperms VII. Nature of nucleolar chromosome polymorphism in Allium cepa var. viviparum (Metzg.) Alef
1983
CYTOLOGIA
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Numerical and structural constancy of nucleolar chromosomes accounts for their extensive usage in cytotaxonomic and phylogenetic research. This constancy notwithstanding, intraspecific variation in number and morphology of these chro mosomes is not wanting. Although this polymorphism has attracted the attention of cytogeneticists from time to time (
doi:10.1508/cytologia.48.323
fatcat:kxbldl2rzjgz5djints73g543i